摘要
为了探索聚天冬氨酸在增强玉米苗期抗旱性的作用以及与保水剂间存在的差异,在控水盆栽条件下,在玉米三叶期分别追施聚天冬氨酸和保水剂。研究结果表明:干旱条件下,施用保水剂和聚天冬氨酸在不同程度上均能有效地促进玉米幼苗根系的生长,增加光合速率,促进地上部干物质积累,其中与干旱处理相比,保水剂和PASP处理使幼苗根长分别增加18.2%和8.3%;侧根数目分别增加26.3%和14.8%;光合速率分别增加6.6%和1.4%,单株干重分别增加33.8%和12.2%。但干旱条件下保水剂处理和聚天冬氨酸处理幼苗根系活力提高作用不明显。
Pot experiment was conducted to study the effects of polyaspartic acid（PASP） and water-retention agent on growth in maize at seedling stage under water controlled condition.The results were as following：under soil water stress condition,water-retention agent and PASP indeed promoted the growth of plant root,photosynthesis and dry matter accumulation.Compared with waters stress treatment,water-retention agent and PASP treatments induced to the increase of root length by 18.2% and 8.3%,the number of side root by 26.3 %,14.8%,the photosynthesis by 6.6%,1.4%,and the dry matter by 33.8% and 12.2%,respectively,however,there was no obvious effect of PASP on root vigor under water stress condition,neither for the water-retention agent.
出处
《中国农学通报》
CSCD
2013年第6期59-62,共4页
Chinese Agricultural Science Bulletin
基金
公益性行业(农业)科研专项"北方主要作物抗旱节水综合技术研究与区域示范"(nyhyzx07-003
200903007)
粮食丰产科技工程子课题"鲁东丘陵区小麦玉米稳产增效技术集成研究与示范"(2011BAD16B09-03)
山东省"泰山学者建设工程"专项经费
关键词
玉米
抗旱性
光合速率
干物质积累
maize
drought tolerance
photosynthesis
dry matter accumulation
